Register mechanism for computing-machines.



0. D. JOHANTGEN. MECHANISM'FOR COMPUTIN APPLICATION FILED OCT. 29. I

G MACHINES.

REGISTER Patented Apr. 29, 1919.

S SHEETS-SHEETI INI/ENTOR.

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0. D. JOHANTGEN. RGISTER MECHANISM FOR COMPUTING MACHINES.

APPLICATION FILED OCT. 2'), IQI,

.I1 2 T. F. 1U N /N 9a /R r., I T am ma )M r, Il J @d Qu 4. Q 11 WL m GN W 1i 0. D. JOHANTGEN. REGISTER MECHANISIII FOR COMPUTING MACHINES.

APPLICATION FILED OCT. 29, |917.

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I J0 IIIIIIIII III/I IIIIIIIIIIIII/I IN VEN TOR. W I TNESS Patented A p1'. 29, 1919.

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LIVEI?, 'OHANTC-EN, OF CHICAGO, ILLINOIS.

Suecicazion of Letters Patent.

ainsi-tentera nos. corrrUTrNc-MAcH-mns.

Patented Api?. e9, 1919.

"on inert at?, 1916, Serial No.`100,531. Bivided and` this application filedctobcr 29,

ier?. semaine. 198,959.

lilinois, have invented a lily invention relates t` improvements in computing' machines and more particularly to the accumulator mechanism or register. The object oit the intention is to provide an improved register which may he used to ef- *feet either additiofor subtraction.

Y'lhe preferred torni of register illustrated in the drawings and described herein, is designe-:l more particularly tor use with a ten 'addingV and listing machine of the type sed in my tivo ccpending applications, ,"l Numbers 16%30, and 100531, both May 29th, 11315, the present applicabeinn a. division ci application No. The invention is not limited to its us with machines ci this type however, as many ci the features thereof are adapted for a Wide range or" application to computing machines generally.

Referring to the drawings:

, Figure 1 is a. sectional elevation oi mechanism embodying the invention;

Fig. 2 is a top planview thereof;

rFigs. 3 and i show details ot the subtraction key mechanism;

Figs. 5 and 6 show".7 tie accumulator and carrying mechanism in two diilferent positions; l

llig. 7 is a top plan view ci the mecha- -nism in the letter part ci the carriage;

Fig. Sis a perspective vievv of a bell crank leverg- Fig.

and

10 1s a top plan viewthereof.

As an aid in understanding the details 9 is an elevationA ot a carrying plate;

of the register and the mechanism associated therewith, of which the carriage 1s composed, the following brief description is given of the operation of the machine as a Whole.

To enter the litems in the machine,'the cnerator depresses digit keys which position combined accumulator actuating owing is a full, clear, concise, and exact dea roller` or pulley 17 mounted thereon.

ing the latter.

rack and type rack. The carriage is moved transversely across the machine with a step by step movement as the keys are'actuated, whereby said rack is engaged successively by the accumulator Wheels. The rack, which is elevated a variable amount by the depression oi the digit keys, turns the accumulator Wheels and immediately thereafter is thrown rearwardly, striking against the platen to print the digits of thev item, one .at a time. ln the embodiment of the invention illustrated more tullyin the prior application, Serial Humber 100530, previously referred to, the. keys are depressed in the order corresponding to the natural order in which the digits are read, namely, from left to right. To permit this operation, the carriage is first manually moved to the right by the operator by means of a lever having keys thereon which determine the extent of the throw of said lever and hence stop the carriage in a position corresponding to the ldigit of the highest order. The carriage thereafter moves from right to' left, step by step, to the position corresponding' to the digit ot the lowest order. It the machine is designed for operators accustomed to set the item backward, that is, from right to left, the

' escapement mechanism and certain associated parts, may be reversed to permit operation of the carriage in the reverse direction.

The acc'uI-nulator carriage comprises a pair of side plates 10, 11, connected by various transverse members hereinafter referred to. A cover plate 12' is arranged at the front of the carriage which extends upwardly and partially over-the top, being provided with a sight opening 13 through which the numeral wheels are visible. A bottom plate le is secured to said side plates,

which are connected also at their rear by a transverse plate 15, carrying, a stud 16 vyliltlh e carriage is supported at its rear end by means vof said roller which rides along a cross rod 18 mounted at opposite ends in brackets 19 secured to the body 20 ofthe machine, said rod passing through openings 21 in the side plates 10, 11, and clear- The forward portion othe carriage is supported on a yoke 22 associated with suitable escapement mechanismjjlocated wherebysalvd in thejbod'y of the machine,

by a rack 25 (Fig. 1),

across the machine.

. setting lever 23,

'said wheels completes its rotation,

step by step movement It is-moved in the opa manually operated to the body of the carriage is given a posite direction by pivoted machine at 24.

The accumulator or register is actuated which rack is reciproeated or differentially positioned in a vertical direction byv key actuated mechanism in the body of the machine. It may also be moved forward and backward slightly by a printing lever 26, which has 'sliding engagement therewith by means of a stud 27 and slot 28 (Fig. 5). Said lever 26 is arranged to lock the carriage against movement, and has a projection 29 thereon adapted to perform other functions to be described. As -the'rack is being elevated,- it is in engagement with some one ofl a Series of idler wheels 30 constituting part of the accumulator, and mounted on a shaft 31, the latter being carried in a pair of arms 32 mounted to turn about a pair of studs 33, 34, secured to the side plates 10, 11- Said idler wheels, as shown in Fig. 1, are in mesh with a series of gear wheels or totalizer wheels 35 mounted on a shaft 36. Each totalizer wheel ha a numeral wheel 37 arranged to turn therewith. Said numeral wheels are adjacent to the previously mentioned sight opening. A series of register wheels 38 supported on a shaft 39 are also arranged in engagement with the totalizer wheels 35. If the arms 32 are swung downwardly through a small angle, the idlers 30 will be moved out of mesh with the totalizer wheels 35 and moved into mesh withv the register wheels 38. This latter is the subtraction position, in which rotation of the idlers 80 by the rack will be communie-ated directly to the register wheels, the numeral wheels having their rotation reversed;

The carrying is effected by collars 40 each having al single tooth 4l thereon, each collar 'being arranged to turn with one of the register wheels 38. Vhenever one of the tooth 41 engages a finger 42 constituting part of plates, one in each a substantially T-shaped carrying plate 43. (Figs. 9 and 10.) There are aseries of such of the spaces between the wheels 38 and each is pivoted on a stud 44 on an arm 45 mounted on a shaft 46 and normally held in the position shown by a spring 46. The end of the finger 42 is cut away, as shown in Figs. 9, 10, the cutout part being pressed between the teeth of the adjacent register wheel; the one above the one shown in. Fig. 1. The position of the plate` 43 with respect to the arm 45 isimain` tained by a small rectifying lever 47 pivotally mounted on the arm 45 and held against the flat head of the T by a spring 48 as shown. Said T-plate tends to remain in the positionsho'wn but when swung about its pivot 44 through. a small angle bythe carrying tooth 41, it advaneesQtghe next wheel 38 an amount corresponding? to onef complete rotation of theTplate. 1t will I is the same regardless of the dlrection of rotationjof the gear 38, except that the T-plate is Imoved in the opposite direction and the opposite be notedl that the. operation corner 49 then acts as a holding pawl`.`* -'El1e` carrying device is therefore operative either.

for additlon or subtraction.

The carryingl action is very rapid, since the finger 42 is pressed radially inward toward the center of the register wheels 38, the arrangement being similar 'to a toggle. As long as said finger remains on the dead center, there is as soon as said linger is moved out of radial alinement by the carrying tooth 41, the spring 46 throws the piat'e 43 and the finger 42 rearwardly, thereby completing the carr ing movement begun by the tripping of t e finger 42 by the tooth 41. l

The eiiect of the spring 48 on the rectifying lever 47 is to tend to restore the T-plate to normal position and to permit the finger to act as a spring lock to resist rotation of the register wheels, when in normal position. Such return to normal position however, if permitted, would rotate the gears 30, 35, 38. Said rotation therefore is opposed by the pawl 50 which is held in frictional engagement with the ,wheel 35 by the spring 51.

Said T-plates may be restored to normal position however, by means of the rectifying levers 47 and then` springs 48, if. the arms 45 on 'which they are mounted are moved forwardly. Such forward movement is accomplished by pair of pivoted arms 53 which are pivotally mounted on the shaft 46 o n opposite sides of the group of carrying devices. The lower ends of said arms 53 are connected by a second cross bar 54. The forward movement of said cross bars is effected by means of a lever 55 which is pivoted about the stud 56 and carries a grooved roller 57 the latter engaging the cross bar 54 and. swinging the same forwardly as the lever 55|'rotates about its pivot (Fig. 7). Said lever is moved by a stud 58 which projects downwardly through a curved slot 59; in the bottom plate 14 of the carriage.' ;The lower end of said stud is received within a slot 60 in the carriage set-ting lever 23; Prior to the a crossfrod 52'earried by a no carrying movement, but

' time the stud 58 reaches the end of the slot 59, a shoulder 60 on said arm engages a pin 61 on a plate 62 which is mounted to reciprocate on the hase plate 1-1 of the carriage. Said plate is guided by pins 63. 64 secured to said base plate and projecting .through slots 65, G6 therein. It also has a notch 6T adapted to receive the lower end of a latch hereinafter described. The general functionof said plate 62 is t0 move the printing lever 26 out of the notches 68 in the reargof the base plate 14. This removal unlocks the carriage which is otherwise locked against lateral movement by `said lever and said notches. Movement of said lever moves the rack 25 rearwardly. thereby withdrawing it from engagement with the idlei's 30 whereby the carriage may be moved laterally without interference between said rack and said idlers. As the carriage setting leverl is moved laterally by the operator, thearnr is first swung to the limit of movement permitted by the slo't 59 after which the car riage as a whole travels laterally.

ln a machine where it is desired to enter the item by depressing the digit keys in their natural order, namely from left to right. and the carriage is therefore to be. moved from right to left, the following mechanism is provided:

Denominational or order keys are mounted on the carriage Setting lever 23 and serve when depressed to act. as stops and limit the throw of saidlever and hence of said carriage. Said -keys are normally held in uppermost position by springs 71. lVhen any one is depressed and the lever swung to the right, the lower end of said pin engages the forward end ot a stop lever 72 thereby swinging said lever about its pivotal support 7 3 mounted on the body ot the machine. An arm 74 on said Stop lever is swung forwardly and engages a toothed plate' 75 mounted on the under side of the carriage. thereby positively locking the carriage and the lever against further movement. The carriage is thus swung to thc position corresponding to thc highest order of the item t0 beregistered` and thereafter the depression of the digit keys operatesthe escapement mechanism, whereby the successive idler wheels 30 are brought into mesh with the rack .seriatim until lthe carriage reaches its initial position.

1f the machine is to be constructed to permit the item tov be entered from right to left., the` denominational keys 70 mayV be omitted and the escapement mechanism and setting lever reversed, whereby the carriage may move from left toA right as the operator depresses the digit keys, and may subsequently be restored to normal position by said lever or some other manually operated device.

To effect subtraction, the subtraction key -gagement is pressed rearwardly. Said ke Ais mounted on a stud 81 in the frame o the machine and also on a stud 82 mounted in a.

member 83, the latter being pivoted aboutv the stud 84. Said stu-ds 81, 82 pass through suitable slots 85, 86 in said key. A link 87 i is also mounted on said studs and has a slot 88 at one end, a little shorter than the companion slot opposite end. It also has a downwardly projecting lock 90. A latch 91 having the form of a. bell crank lever is mounted adja-v cent said key on a stud 92, the lower end of' said latch tting within the notch 67 in the reciprocating plate 62 (Fig. 7). Said latch 91 has a lateral projection 93 thereon-Which is arranged in the path of a projection 94 on the subtraction key. The rea-1' end of said projection 94 is beveled, whereby as said subtraction key isv pressed rearwardly, said bevel rides over the lateral projection 93 thereby rocking the latch and moving the plate 62 and the printing lever 26 to the rear, thus moving the rack 25 out of enwith the idlers 30, which engagement would interfere with the swinging of said idlers to subtraction posf'ion.

Prior to the actuation of the subtraction key 80, the link 87 is in its forward position with its projection in front of the lateral extension 93. This locks the member 83 against movement, thereby prevent-ing accidental movement of the accumulator from 85, and having a hole 89 in the addition to subtraction position, such as might be caused for example, if the rack were in engagement with the idlers. Before the subtraction key reaches the end of its rearward movement, the stud 82 is engaged by the end of the slot 86,'rocking the member 83 and drawing the link 87 to the rear until its projection 90 is to the rear ofthelug 93, at which time the accumulator gears have the lug 93 thereby ptrmitting the plate 62 to restore the latch 91 'tonormal position, the subtraction key being thereby locked against return movement by the projection 93.

The spring 96 tends to hold the parts in addition position unless they are positively locked in subtraction position. After the litem has been subtracted, the operator before setting up another item for addition, swings the carriage setting lever to one side as re- -202 viously described, thereby moving the p ate 62 to the rear, this movement serving to swing thc latch 61 sufficiently to release the subtract-ion key 80 and to permit it and the link 87 to be restored to normal position. The restoration to addition position is therefore accomplished automatically. This automatic action prevents oversight on the art of the operator who might leave the mac ine set for subtraction, whereas he may intend to add the subsequent. items. i q

been'moved to subtraction position. Simultaneously, the projection 94 snaps' over t of numeral wheels, and a lster wheels,

ister wheels,

The platen and ribbon feed mechanism may be of any suitable construction and need not be described herein.

It is to be understood that the invention is not limited to the embodiment thereof shown and described in detail herein, as it may be embodied in various other forms, within the scope of the appended claims.

hat is claimed is:

l. An adding machine carriage, comprising a plurality of idler wheels, a plurality plurality of regsaid idler wheels being arranged to reverse the movement of said numeral wheels, la transfer mechanism consisting of a series of fingers normally engaged between the of said register means turning with said register movement to a single restoring said lingers to normal position.

An adding machine carriage, comprising a plurality of idler wheels, a plurality of numeral wheels, and a plurality of regsaid idler wheels being arranged to reverse the movement of said numeral w'heels, a transfer mechanism consisting the wheels engaged thereby, means associated with said fingers for limiting said movement to a single tooth, means for withdrawing said fingers from said teethland means for restoring them to normal posiheads of said T latch teeth thereof,

tion.

3. In a transfer mechanism,a series of registerlwheels, a series of T-shaped latches engagimgil the same, supports for said latches, a series of spring members held against the es to maintain them in normal position, the points at the ends of said headsacting as stops to prevent overthrow of said wheelsA when engaging the means associated with said wheels for tripping said latches, and means for moving said supports to restore said latchges.

4. In combination, a single actuating rack, a plurality numeral wheels rotated by said gears, means for changing the relative arrangement of the g ars of each train to 'permit reverse rotation of said numeral wheels, thus eiiccting subtraction, a carrying mechanism having fingers normally engaging the teeth of one of the gears in each tram, and means for throwing said fingers in either direction of the next able to permit coperation higher order to indicate the carrying operationeither during addition or subtraction and. spring-actuated means for completing sai carrying operation.

arrangement of said tation of said numeral lwheels, carrying lmechanism consisting of a'series of pivoted In combination, an accumulator consisting of a plurality of trains of gear said accumulator, said rack and accumulator being relatively movof said rack with one of the gears of each trainserzatzfm, a series of carrying lingers; therefor, means for holding said fingers radially with respect to one of the gears of said trains, means impelling said supports toward said accumulator to press said fingers said mrs, means tion or subtraction.

In witness whereof, I hereunto subscribe my7name this 26thday of October A.'.D., 191

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gears to reverse the rofinger in radial position, a A

a movable support'YH 

